cause air noise or whistling due to the reduced air gap. 16 Maximum boiler temperature 75°C/ 167°F (does not go up to 82°C/ 180°F at design) Boiler starts modulating down as boiler temperature approaches 75°C/167°F (modulating boiler). Between 75°C/167F to 82°C/180F boiler operates (on min. fire) until load is satisfied – shut down at
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